/* Attendance Show Hide */
function show_hide(e, v){
	var attendance = document.getElementById(v);
	var attendance_fnc = document.getElementById(e);
	if(attendance.style.display == "none"){
		attendance.style.display = "block";
		attendance_fnc.src="/images/attendance/btn_attendance_up.png";
	}else{
		attendance.style.display = "none";
		attendance_fnc.src="/images/attendance/btn_attendance_down.png";
	}
}

/* Global Navigation Bar */

var gnb_hover = function()
{
	var gnb = document.getElementById("gnb");
	var gnb_lis = gnb.getElementsByTagName("li");
	for(var i=0; i<gnb_lis.length; i++)
	{
		gnb_lis[i].onmouseover = function()
		{
			ul_clear();
			if((this.className).substr(0,4) == 'menu' )
			{
				sub_ul = this.getElementsByTagName('ul');
				sub_ul[0].style.visibility = 'visible';
				//this.style.visibility = 'visible';
			}
		}
	}

	function ul_clear()
	{
		var sub_uls = gnb.getElementsByTagName("ul");
		for(var j=0; j<sub_uls.length; j++)
		{
			sub_uls[j].style.visibility = "hidden";
		}
	}
}

window.onload = function(){
    gnb_hover();
}